fix(webhook): handle Saleor subscription payload format (array)

Saleor sends webhook payloads as arrays in subscription format.
This fix extracts the order from the array or object format.

src/app/api/webhooks/saleor/route.ts

@@ -400,12 +400,24 @@ export async function POST(request: NextRequest) {
 
     console.log(`Received webhook: ${event} from ${domain}`);
     console.log("Headers:", { event, domain, apiUrl, hasSignature: !!signature });
-    console.log("Payload keys:", Object.keys(body));
+    console.log("Payload:", JSON.stringify(body).substring(0, 500));
     
-    if (body.order) {
-      console.log("Order ID:", body.order.id);
-      console.log("Order number:", body.order.number);
-      console.log("User email:", body.order.userEmail);
+    // Handle Saleor subscription payload format (array of events)
+    let order = null;
+    if (Array.isArray(body)) {
+      // Find the order in the array
+      const orderEvent = body.find((item: any) => item.order);
+      if (orderEvent) {
+        order = orderEvent.order;
+      }
+    } else if (body.order) {
+      order = body.order;
+    }
+    
+    if (order) {
+      console.log("Order ID:", order.id);
+      console.log("Order number:", order.number);
+      console.log("User email:", order.userEmail);
     }
 
     if (!event) {
@@ -420,9 +432,12 @@ export async function POST(request: NextRequest) {
       return NextResponse.json({ success: true, message: "Event not supported" });
     }
 
-    const payload = body;
+    if (!order) {
+      console.error("No order found in webhook payload");
+      return NextResponse.json({ error: "No order in payload" }, { status: 400 });
+    }
 
-    await handleSaleorWebhook(normalizedEvent, payload);
+    await handleSaleorWebhook(normalizedEvent, { order });
 
     return NextResponse.json({ success: true });
   } catch (error) {